I may be making this up – was there an eccentric to allow one crank length serve an equivalent 170 – 175mm effective length?

Yarden Bar-nov - 07/09/12 - 7:58am

Hello I’m Yarden Bar-nov from Israel and the part Is…. Campagnolo C Record Delta brake without the front cover.

hjhanny - 07/09/12 - 8:49am

Definitly Shimano AX, came both as Dura Ace and 600er. DA much rarer, brake pads are impossible to find but todays Swisstop can be shortend to match. Found a complete groupset and equipped an old Gios Torino Aerodynamico with it to rebuild of a late 70′s early 80′s aero bike :-). I have another complete groupset if someone is interested

If I remember correctly the crank pedal combo featured a large whole in the crank and a pedal with a dropped platform. It put the sole of the shoe below the center of the pedal axle. I believe they were popular with Alexi Grewal even after their day had passed.

Chis - 07/09/12 - 5:52pm

The crank was called DynaDrive and yes, the idea was to put the ball of the foot inline with the pedal axle by moving the pedal bearings inside the crank. This of course required a MUCH larger pedal spindle and the cranks had a much larger hole in them as a result. The AX group was a sign that the sake was flowing freely around Shimano HQ. I used to have a Lotus frame built around this group. They recessed the spoke heads, the headset had a clear plastic cover to make it more aero, they had an airfoil shaped water bottle, an airfoil shaped seatpost (requiring airfoil shaped tubing), etc. The whole thing was pretty crazy but also kind of neat to look at. BTW Lance Armstrong used one of these brakes on his Trek/Litespeed TT bike back in the Tour. The brakes were a paint to adjust, didn’t stop well, were relatively heavy, and had no less frontal area and drag than a regular sidepull. Modolo had a similar brake around this time – the Kronos – that was much lighter and much smaller. It was also a pain to install and almost completely useless for slowing down, especially if you were running a disc wheel!

@ Atganirider – 07/09/12 – 7:20am
“btw – any pictures of the unique chainset / pedal combination?
From memory, they had a much larger than usual spindle-diameter for the pedals
Now I may well be making this up, but were they on an eccentric, enabling one crank to cover 170 – 175mm effective length?”

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